\begin{tabular}{l*{4}{c}}
\toprule
            &\multicolumn{1}{c}{\shortstack{Cand. wins, t+1 \\ (more than avg)}}&\multicolumn{1}{c}{\shortstack{Orient. nb. other cand.,\\ t+1 (more than avg)}}&\multicolumn{1}{c}{\shortstack{Cand wins., t+1 \\ (fewer than avg)}}&\multicolumn{1}{c}{\shortstack{Orient. nb. other cand.,\\t+1 (fewer than avg)}}\\\cmidrule(lr){2-2}\cmidrule(lr){3-3}\cmidrule(lr){4-4}\cmidrule(lr){5-5}
            &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
\midrule
RD\_Estimate &       0.263&      -0.528&       0.245&      -0.378\\
            &     (0.040)&     (0.119)&     (0.027)&     (0.072)\\
\midrule
Robust p-value&       0.000&       0.011&       0.000&       0.001\\
Observations&        2585&        2133&        4787&        4442\\
Polynomial order&           1&           1&           1&           1\\
Bandwidth   &       0.050&       0.050&       0.050&       0.050\\
Mean, left of threshold&       0.169&       2.424&       0.137&       1.576\\
\bottomrule
\end{tabular}
